import turtle  
from datetime import *  
   
# 抬起画笔，向前运动一段距离放下  
def Skip(step):  
    turtle.penup()  
    turtle.forward(step)  
    turtle.pendown()  
   
def mkHand(name, length):  
    # 注册Turtle形状，建立表针Turtle  
    turtle.reset()  
    Skip(-length * 0.1)  
    # 开始记录多边形的顶点。当前的乌龟位置是多边形的第一个顶点。  
    turtle.begin_poly()  
    turtle.forward(length * 1.1)  
    # 停止记录多边形的顶点。当前的乌龟位置是多边形的最后一个顶点。将与第一个顶点相连。  
    turtle.end_poly()  
    # 返回最后记录的多边形。  
    handForm = turtle.get_poly()  
    turtle.register_shape(name, handForm)  
   
def Init():  
    global secHand, minHand, hurHand, printer  
    # 重置Turtle指向北  
    turtle.mode("logo")  
    # 建立三个表针Turtle并初始化  
    mkHand("secHand", 135)  
    mkHand("minHand", 125)  
    mkHand("hurHand", 90)  
    secHand = turtle.Turtle()  
    secHand.shape("secHand")  
    minHand = turtle.Turtle()  
    minHand.shape("minHand")  
    hurHand = turtle.Turtle()  
    hurHand.shape("hurHand")  
     
    for hand in secHand, minHand, hurHand:  
        hand.shapesize(1, 1, 3)  
        hand.speed(0)  
     
    # 建立输出文字Turtle  
    printer = turtle.Turtle()  
    # 隐藏画笔的turtle形状  
    printer.hideturtle()  
    printer.penup()  
      
def SetupClock(radius):  
    # 建立表的外框  
    turtle.reset()  
    turtle.pensize(7)  
    for i in range(60):  
        Skip(radius)  
        if i % 5 == 0:  
            turtle.forward(20)  
            Skip(-radius - 20)  
             
            Skip(radius + 20)  
            if i == 0:  
                turtle.write(int(12), align="center", font=("Courier", 14, "bold"))  
            elif i == 30:  
                Skip(25)  
                turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))  
                Skip(-25)  
            elif (i == 25 or i == 35):  
                Skip(20)  
                turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))  
                Skip(-20)  
            else:  
                turtle.write(int(i/5), align="center", font=("Courier", 14, "bold"))  
            Skip(-radius - 20)  
        else:  
            turtle.dot(5)  
            Skip(-radius)  
        turtle.right(6)  
          
def Week(t):     
    week = ["星期一", "星期二", "星期三",  
            "星期四", "星期五", "星期六", "星期日"]  
    return week[t.weekday()]  
   
def Date(t):  
    y = t.year  
    m = t.month  
    d = t.day  
    return "%s %d %d" % (y, m, d)  
   
def Tick():  
    # 绘制表针的动态显示  
    t = datetime.today()  
    second = t.second + t.microsecond * 0.000001  
    minute = t.minute + second / 60.0  
    hour = t.hour + minute / 60.0  
    secHand.setheading(6 * second)  
    minHand.setheading(6 * minute)  
    hurHand.setheading(30 * hour)  
      
    turtle.tracer(False)   
    printer.forward(65)  
    printer.write(Week(t), align="center",  
                  font=("Courier", 14, "bold"))  
    printer.back(130)  
    printer.write(Date(t), align="center",  
                  font=("Courier", 14, "bold"))  
    printer.home()  
    turtle.tracer(True)  
   
    # 100ms后继续调用tick  
    turtle.ontimer(Tick, 100)  
   
def main():  
    # 打开/关闭龟动画，并为更新图纸设置延迟。  
    turtle.tracer(False)  
    Init()  
    SetupClock(160)  
    turtle.tracer(True)  
    Tick()  
    turtle.mainloop()  
   
if __name__ == "__main__":  
    main() 
